DAS, S.C. DANGER OF IMPROPER USE OF MATHEMATICAL RESULTS, FORMULAS AND SYMBOLS : TRIGONOMETRY. SCHOOL SCIENCE, [S. l.], v. 51, n. 3, p. P.26–33, 2013. Disponível em: http://14.139.250.109/index.php/SS/article/view/2002. Acesso em: 20 aug. 2025.